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</a></div> <!----></nav>  <ul class="sidebar-links"><li><a href="/docs/vue/" aria-current="page" class="sidebar-link">说明</a></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>Vue 2.0 全解</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/vue/options.html" class="sidebar-link">Vue 简介 &amp; 构造选项</a></li><li><a href="/docs/vue/responsive.html" class="sidebar-link">Vue 数据响应式</a></li><li><a href="/docs/vue/computed-and-watch.html" class="sidebar-link">Vue 计算属性和监听器</a></li><li><a href="/docs/vue/template-instruction-modifier.html" class="sidebar-link">Vue 模板、指令与修饰符</a></li><li><a href="/docs/vue/advanced-options.html" class="sidebar-link">Vue 进阶属性</a></li><li><a href="/docs/vue/prop.html" class="sidebar-link">Vue Prop 自定义属性</a></li><li><a href="/docs/vue/form-and-model.html" class="sidebar-link">Vue 表单与输入绑定</a></li><li><a href="/docs/vue/router.html" aria-current="page" class="active sidebar-link">Vue Router 的原理</a></li><li><a href="/docs/vue/transition.html" class="sidebar-link">Vue 动画原理</a></li><li><a href="/docs/vue/tree-component.html" class="sidebar-link">递归组件</a></li><li><a href="/docs/vue/plugin.html" class="sidebar-link">Vue 常用插件</a></li><li><a href="/docs/vue/create-project.html" class="sidebar-link">Vue 快速搭建项目</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>VuePress</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/vue/vuepress/started.html" class="sidebar-link">快速搭建文档</a></li><li><a href="/docs/vue/vuepress/markdown.html" class="sidebar-link">Markdown 语法拓展</a></li><li><a href="/docs/vue/vuepress/element-ui.html" class="sidebar-link">添加 Element 组件</a></li><li><a href="/docs/vue/vuepress/file-path.html" class="sidebar-link">关于文件路径</a></li></ul></section></li></ul> </div></div><div class="el-scrollbar__bar is-horizontal"><div class="el-scrollbar__thumb" style="width:0;transform:translateX(0%);ms-transform:translateX(0%);webkit-transform:translateX(0%);"></div></div><div class="el-scrollbar__bar is-vertical"><div class="el-scrollbar__thumb" style="height:0;transform:translateY(0%);ms-transform:translateY(0%);webkit-transform:translateY(0%);"></div></div></div></aside> <main class="page"> <div class="re-page-top"><h1 class="title"><span>Vue Router 的原理</span></h1> <div class="re-page-index"><div class="page-index-title"><span class="open-catalog"><svg aria-hidden="true" class="icon arrow-right"><use xlink:href="#icon-bold-right"></use></svg> <span class="text">目录</span></span></div> <div class="page-index-content"><div class="page-catalog" style="display:none;"><div class="synopsis-wrap"><ul class="synopsis-ul"><li class="synopsis-li"><a href="/docs/vue/router.html#hash-路由" class="synopsis-link">hash 路由</a><ul class="synopsis-ul"><li class="synopsis-li"><a href="/docs/vue/router.html#实现-hash-路由" class="synopsis-link">实现 hash 路由</a></li></ul></li><li class="synopsis-li"><a href="/docs/vue/router.html#history-路由" class="synopsis-link">history 路由</a><ul class="synopsis-ul"><li class="synopsis-li"><a href="/docs/vue/router.html#实现-history-路由" class="synopsis-link">实现 history 路由</a></li></ul></li></ul></div></div></div></div></div> <div class="theme-default-content content__default" data-v-209e6444 data-v-209e6444><h2 id="hash-路由" data-v-209e6444><a href="#hash-路由" class="header-anchor" data-v-209e6444>#</a> hash 路由</h2> <p data-v-209e6444>hash 路由可以在任何情况下使用，但是 hash 路由 <code data-v-209e6444>#</code> 后的内容无法被服务器接收到，所以你不论访问那个页面，服务器都只会认为你访问了根路径（SEO不友好）。</p> <h3 id="实现-hash-路由" data-v-209e6444><a href="#实现-hash-路由" class="header-anchor" data-v-209e6444>#</a> 实现 hash 路由</h3> <p data-v-209e6444>实现一个简单的跳转功能，路由显示 #1 时跳转 div1 ，路由显示 #2 时跳转 div2... 依次类推。</p> <div class="language-html extra-class" data-v-209e6444><pre class="language-html" data-v-209e6444><code data-v-209e6444><span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>div</span> <span class="token attr-name" data-v-209e6444>class</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>navbar<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
  <span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>a</span> <span class="token attr-name" data-v-209e6444>href</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>#1<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>go to 1<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>a</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
  <span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>a</span> <span class="token attr-name" data-v-209e6444>href</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>#2<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>go to 2<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>a</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
  <span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>a</span> <span class="token attr-name" data-v-209e6444>href</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>#3<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>go to 3<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>a</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
  <span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>a</span> <span class="token attr-name" data-v-209e6444>href</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>#4<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>go to 4<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>a</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>div</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>div</span> <span class="token attr-name" data-v-209e6444>id</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>app<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span><span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>div</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
</code></pre></div><div class="language-js extra-class" data-v-209e6444><pre class="language-js" data-v-209e6444><code data-v-209e6444><span class="token keyword" data-v-209e6444>const</span> app <span class="token operator" data-v-209e6444>=</span> document<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>querySelector</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>'#app'</span><span class="token punctuation" data-v-209e6444>)</span>

<span class="token comment" data-v-209e6444>// 创建路由 hash 表</span>
<span class="token keyword" data-v-209e6444>const</span> hash <span class="token operator" data-v-209e6444>=</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token string" data-v-209e6444>'1'</span><span class="token operator" data-v-209e6444>:</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>'1'</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>,</span>
  <span class="token string" data-v-209e6444>'2'</span><span class="token operator" data-v-209e6444>:</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>'2'</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>,</span>
  <span class="token string" data-v-209e6444>'3'</span><span class="token operator" data-v-209e6444>:</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>'3'</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>,</span>
  <span class="token string" data-v-209e6444>'4'</span><span class="token operator" data-v-209e6444>:</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>'4'</span><span class="token punctuation" data-v-209e6444>)</span>
<span class="token punctuation" data-v-209e6444>}</span>

<span class="token comment" data-v-209e6444>// 生成 404 页面</span>
<span class="token keyword" data-v-209e6444>const</span> page404 <span class="token operator" data-v-209e6444>=</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>'404'</span><span class="token punctuation" data-v-209e6444>)</span>

<span class="token comment" data-v-209e6444>// 第一次加载页面时根据路由渲染页面</span>
<span class="token function" data-v-209e6444>router</span><span class="token punctuation" data-v-209e6444>(</span>app<span class="token punctuation" data-v-209e6444>)</span>

<span class="token comment" data-v-209e6444>// 监听路由，路由改变时再次渲染页面</span>
window<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>addEventListener</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>'hashchange'</span><span class="token punctuation" data-v-209e6444>,</span> <span class="token punctuation" data-v-209e6444>(</span><span class="token punctuation" data-v-209e6444>)</span> <span class="token operator" data-v-209e6444>=&gt;</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token function" data-v-209e6444>router</span><span class="token punctuation" data-v-209e6444>(</span>app<span class="token punctuation" data-v-209e6444>)</span>
<span class="token punctuation" data-v-209e6444>}</span><span class="token punctuation" data-v-209e6444>)</span>

<span class="token comment" data-v-209e6444>// 根据路由将元素插入到 DOM 中</span>
<span class="token keyword" data-v-209e6444>function</span> <span class="token function" data-v-209e6444>router</span><span class="token punctuation" data-v-209e6444>(</span><span class="token parameter" data-v-209e6444>el</span><span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token keyword" data-v-209e6444>let</span> number <span class="token operator" data-v-209e6444>=</span> window<span class="token punctuation" data-v-209e6444>.</span>location<span class="token punctuation" data-v-209e6444>.</span>hash<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>substr</span><span class="token punctuation" data-v-209e6444>(</span><span class="token number" data-v-209e6444>1</span><span class="token punctuation" data-v-209e6444>)</span>
  <span class="token comment" data-v-209e6444>// 如果 number 不存在，默认显示 div1</span>
  number <span class="token operator" data-v-209e6444>=</span> number <span class="token operator" data-v-209e6444>||</span> <span class="token number" data-v-209e6444>1</span>
  el<span class="token punctuation" data-v-209e6444>.</span>innerHTML <span class="token operator" data-v-209e6444>=</span> <span class="token string" data-v-209e6444>''</span>
  <span class="token keyword" data-v-209e6444>const</span> div <span class="token operator" data-v-209e6444>=</span> hash<span class="token punctuation" data-v-209e6444>[</span>number<span class="token punctuation" data-v-209e6444>]</span>
  <span class="token comment" data-v-209e6444>// 如果 div 不存在，则渲染 404 页面</span>
  <span class="token keyword" data-v-209e6444>if</span> <span class="token punctuation" data-v-209e6444>(</span>div<span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
    el<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>appendChild</span><span class="token punctuation" data-v-209e6444>(</span>div<span class="token punctuation" data-v-209e6444>)</span>
  <span class="token punctuation" data-v-209e6444>}</span> <span class="token keyword" data-v-209e6444>else</span> <span class="token punctuation" data-v-209e6444>{</span>
    el<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>appendChild</span><span class="token punctuation" data-v-209e6444>(</span>page404<span class="token punctuation" data-v-209e6444>)</span>
  <span class="token punctuation" data-v-209e6444>}</span>
<span class="token punctuation" data-v-209e6444>}</span>

<span class="token comment" data-v-209e6444>// 创建 div ，并添加内容</span>
<span class="token keyword" data-v-209e6444>function</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token parameter" data-v-209e6444>text</span><span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token keyword" data-v-209e6444>const</span> div <span class="token operator" data-v-209e6444>=</span> document<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>createElement</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>'div'</span><span class="token punctuation" data-v-209e6444>)</span>
  div<span class="token punctuation" data-v-209e6444>.</span>innerHTML <span class="token operator" data-v-209e6444>=</span> text
  <span class="token keyword" data-v-209e6444>return</span> div
<span class="token punctuation" data-v-209e6444>}</span>
</code></pre></div><section class="re-part" data-v-209e6444><div class="demo-tool" data-v-209e6444><span class="tool-left" data-v-209e6444>&lt;-</span> <span class="tool-right" data-v-209e6444>-&gt;</span> <div class="demo-url" data-v-209e6444><span data-v-209e6444></span></div></div> <div class="demo-navbar" data-v-209e6444><a href="#1" data-v-209e6444>Go to 1</a> |
    <a href="#2" data-v-209e6444>Go to 2</a> |
    <a href="#3" data-v-209e6444>Go to 3</a> |
    <a href="#4" data-v-209e6444>Go to 4</a> |
    <a href="#404" data-v-209e6444>404</a></div> <div id="demo-app" data-v-209e6444>div1</div></section> <p data-v-209e6444>案例地址：<a href="https://codesandbox.io/s/determined-hooks-wgj7u" target="_blank" rel="noopener noreferrer" data-v-209e6444>https://codesandbox.io/s/determined-hooks-wgj7u<span data-v-209e6444><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></p> <h2 id="history-路由" data-v-209e6444><a href="#history-路由" class="header-anchor" data-v-209e6444>#</a> history 路由</h2> <p data-v-209e6444>使用 history 路由，必须要保证后端能够将所有前端路由都渲染至同一个页面，也就是不论请求该域名下的那个页面，都渲染同一个页面，前端根据请求的路径渲染不同的内容。</p> <h3 id="实现-history-路由" data-v-209e6444><a href="#实现-history-路由" class="header-anchor" data-v-209e6444>#</a> 实现 history 路由</h3> <p data-v-209e6444>history 模式的路由，主要注意</p> <ol data-v-209e6444><li data-v-209e6444>需要监听 a 标签的点击事件，阻止它的默认点击事件，防止页面刷新。</li> <li data-v-209e6444>利用 <code data-v-209e6444>window.history.pushState()</code> API 将路径添加到 url 中。</li> <li data-v-209e6444>每次点击 a 标签后重新渲染页面。</li></ol> <div class="language-html extra-class" data-v-209e6444><pre class="language-html" data-v-209e6444><code data-v-209e6444><span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>div</span> <span class="token attr-name" data-v-209e6444>class</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>navbar<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
  <span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>a</span> <span class="token attr-name" data-v-209e6444>class</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>link<span class="token punctuation" data-v-209e6444>&quot;</span></span> <span class="token attr-name" data-v-209e6444>href</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>/1<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>go to 1<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>a</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
  <span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>a</span> <span class="token attr-name" data-v-209e6444>class</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>link<span class="token punctuation" data-v-209e6444>&quot;</span></span> <span class="token attr-name" data-v-209e6444>href</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>/2<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>go to 2<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>a</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
  <span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>a</span> <span class="token attr-name" data-v-209e6444>class</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>link<span class="token punctuation" data-v-209e6444>&quot;</span></span> <span class="token attr-name" data-v-209e6444>href</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>/3<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>go to 3<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>a</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
  <span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>a</span> <span class="token attr-name" data-v-209e6444>class</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>link<span class="token punctuation" data-v-209e6444>&quot;</span></span> <span class="token attr-name" data-v-209e6444>href</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>/4<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span>go to 4<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>a</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>div</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
<span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;</span>div</span> <span class="token attr-name" data-v-209e6444>id</span><span class="token attr-value" data-v-209e6444><span class="token punctuation attr-equals" data-v-209e6444>=</span><span class="token punctuation" data-v-209e6444>&quot;</span>app<span class="token punctuation" data-v-209e6444>&quot;</span></span><span class="token punctuation" data-v-209e6444>&gt;</span></span><span class="token tag" data-v-209e6444><span class="token tag" data-v-209e6444><span class="token punctuation" data-v-209e6444>&lt;/</span>div</span><span class="token punctuation" data-v-209e6444>&gt;</span></span>
</code></pre></div><div class="language-js extra-class" data-v-209e6444><pre class="language-js" data-v-209e6444><code data-v-209e6444><span class="token keyword" data-v-209e6444>const</span> app <span class="token operator" data-v-209e6444>=</span> document<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>querySelector</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;#app&quot;</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>

<span class="token comment" data-v-209e6444>// 创建路由 hash 表</span>
<span class="token keyword" data-v-209e6444>const</span> hash <span class="token operator" data-v-209e6444>=</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token string" data-v-209e6444>&quot;1&quot;</span><span class="token operator" data-v-209e6444>:</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;1&quot;</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>,</span>
  <span class="token string" data-v-209e6444>&quot;2&quot;</span><span class="token operator" data-v-209e6444>:</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;2&quot;</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>,</span>
  <span class="token string" data-v-209e6444>&quot;3&quot;</span><span class="token operator" data-v-209e6444>:</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;3&quot;</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>,</span>
  <span class="token string" data-v-209e6444>&quot;4&quot;</span><span class="token operator" data-v-209e6444>:</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;4&quot;</span><span class="token punctuation" data-v-209e6444>)</span>
<span class="token punctuation" data-v-209e6444>}</span><span class="token punctuation" data-v-209e6444>;</span>

<span class="token comment" data-v-209e6444>// 生成 404 页面</span>
<span class="token keyword" data-v-209e6444>const</span> page404 <span class="token operator" data-v-209e6444>=</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;404&quot;</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>

<span class="token comment" data-v-209e6444>// 第一次加载页面时根据路由渲染页面</span>
<span class="token function" data-v-209e6444>router</span><span class="token punctuation" data-v-209e6444>(</span>app<span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>

<span class="token comment" data-v-209e6444>// 初始化 a 标签事件监听</span>
<span class="token function" data-v-209e6444>initLinkChange</span><span class="token punctuation" data-v-209e6444>(</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>

<span class="token comment" data-v-209e6444>// 监听路由，路由改变时再次渲染页面</span>
<span class="token keyword" data-v-209e6444>function</span> <span class="token function" data-v-209e6444>onStateChange</span><span class="token punctuation" data-v-209e6444>(</span><span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token function" data-v-209e6444>router</span><span class="token punctuation" data-v-209e6444>(</span>app<span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
<span class="token punctuation" data-v-209e6444>}</span>

<span class="token comment" data-v-209e6444>// 根据路由将元素插入到 DOM 中</span>
<span class="token keyword" data-v-209e6444>function</span> <span class="token function" data-v-209e6444>router</span><span class="token punctuation" data-v-209e6444>(</span><span class="token parameter" data-v-209e6444>el</span><span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token keyword" data-v-209e6444>let</span> number <span class="token operator" data-v-209e6444>=</span> window<span class="token punctuation" data-v-209e6444>.</span>location<span class="token punctuation" data-v-209e6444>.</span>pathname<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>substr</span><span class="token punctuation" data-v-209e6444>(</span><span class="token number" data-v-209e6444>1</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
  <span class="token comment" data-v-209e6444>// 如果 number 不存在，默认显示 div1</span>
  number <span class="token operator" data-v-209e6444>=</span> number <span class="token operator" data-v-209e6444>||</span> <span class="token number" data-v-209e6444>1</span><span class="token punctuation" data-v-209e6444>;</span>
  el<span class="token punctuation" data-v-209e6444>.</span>innerHTML <span class="token operator" data-v-209e6444>=</span> <span class="token string" data-v-209e6444>&quot;&quot;</span><span class="token punctuation" data-v-209e6444>;</span>
  <span class="token keyword" data-v-209e6444>const</span> div <span class="token operator" data-v-209e6444>=</span> hash<span class="token punctuation" data-v-209e6444>[</span>number<span class="token punctuation" data-v-209e6444>]</span><span class="token punctuation" data-v-209e6444>;</span>
  <span class="token comment" data-v-209e6444>// 如果 div 不存在，则渲染 404 页面</span>
  <span class="token keyword" data-v-209e6444>if</span> <span class="token punctuation" data-v-209e6444>(</span>div<span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
    el<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>appendChild</span><span class="token punctuation" data-v-209e6444>(</span>div<span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
  <span class="token punctuation" data-v-209e6444>}</span> <span class="token keyword" data-v-209e6444>else</span> <span class="token punctuation" data-v-209e6444>{</span>
    el<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>appendChild</span><span class="token punctuation" data-v-209e6444>(</span>page404<span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
  <span class="token punctuation" data-v-209e6444>}</span>
<span class="token punctuation" data-v-209e6444>}</span>

<span class="token comment" data-v-209e6444>// 创建 div ，并添加内容</span>
<span class="token keyword" data-v-209e6444>function</span> <span class="token function" data-v-209e6444>createDiv</span><span class="token punctuation" data-v-209e6444>(</span><span class="token parameter" data-v-209e6444>text</span><span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token keyword" data-v-209e6444>const</span> div <span class="token operator" data-v-209e6444>=</span> document<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>createElement</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;div&quot;</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
  div<span class="token punctuation" data-v-209e6444>.</span>innerHTML <span class="token operator" data-v-209e6444>=</span> text<span class="token punctuation" data-v-209e6444>;</span>
  <span class="token keyword" data-v-209e6444>return</span> div<span class="token punctuation" data-v-209e6444>;</span>
<span class="token punctuation" data-v-209e6444>}</span>

<span class="token comment" data-v-209e6444>// 遍历所有 a 标签，阻止它的默认事件，禁止刷新页面</span>
<span class="token keyword" data-v-209e6444>function</span> <span class="token function" data-v-209e6444>initLinkChange</span><span class="token punctuation" data-v-209e6444>(</span><span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
  <span class="token keyword" data-v-209e6444>const</span> allA <span class="token operator" data-v-209e6444>=</span> document<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>querySelectorAll</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;a.link&quot;</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
  <span class="token keyword" data-v-209e6444>for</span> <span class="token punctuation" data-v-209e6444>(</span><span class="token keyword" data-v-209e6444>let</span> a <span class="token keyword" data-v-209e6444>of</span> allA<span class="token punctuation" data-v-209e6444>)</span> <span class="token punctuation" data-v-209e6444>{</span>
    a<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>addEventListener</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;click&quot;</span><span class="token punctuation" data-v-209e6444>,</span> <span class="token punctuation" data-v-209e6444>(</span><span class="token parameter" data-v-209e6444>e</span><span class="token punctuation" data-v-209e6444>)</span> <span class="token operator" data-v-209e6444>=&gt;</span> <span class="token punctuation" data-v-209e6444>{</span>
      e<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>preventDefault</span><span class="token punctuation" data-v-209e6444>(</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
      <span class="token keyword" data-v-209e6444>const</span> href <span class="token operator" data-v-209e6444>=</span> a<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>getAttribute</span><span class="token punctuation" data-v-209e6444>(</span><span class="token string" data-v-209e6444>&quot;href&quot;</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
      window<span class="token punctuation" data-v-209e6444>.</span>history<span class="token punctuation" data-v-209e6444>.</span><span class="token function" data-v-209e6444>pushState</span><span class="token punctuation" data-v-209e6444>(</span><span class="token keyword" data-v-209e6444>null</span><span class="token punctuation" data-v-209e6444>,</span> <span class="token template-string" data-v-209e6444><span class="token template-punctuation string" data-v-209e6444>`</span><span class="token string" data-v-209e6444>page</span><span class="token interpolation" data-v-209e6444><span class="token interpolation-punctuation punctuation" data-v-209e6444>${</span>href<span class="token interpolation-punctuation punctuation" data-v-209e6444>}</span></span><span class="token template-punctuation string" data-v-209e6444>`</span></span><span class="token punctuation" data-v-209e6444>,</span> href<span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
      <span class="token function" data-v-209e6444>onStateChange</span><span class="token punctuation" data-v-209e6444>(</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
    <span class="token punctuation" data-v-209e6444>}</span><span class="token punctuation" data-v-209e6444>)</span><span class="token punctuation" data-v-209e6444>;</span>
  <span class="token punctuation" data-v-209e6444>}</span>
<span class="token punctuation" data-v-209e6444>}</span>
</code></pre></div><section class="re-part" data-v-209e6444><div class="demo-tool" data-v-209e6444><span class="tool-left" data-v-209e6444>&lt;-</span> <span class="tool-right" data-v-209e6444>-&gt;</span> <div class="demo-url" data-v-209e6444><span data-v-209e6444></span></div></div> <div class="demo-navbar" data-v-209e6444><a href="/1" data-v-209e6444>Go to 1</a> |
    <a href="/2" data-v-209e6444>Go to 2</a> |
    <a href="/3" data-v-209e6444>Go to 3</a> |
    <a href="/4" data-v-209e6444>Go to 4</a> |
    <a href="/404" data-v-209e6444>404</a></div> <div id="demo-app" data-v-209e6444>div1</div></section></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">上次更新：</span><span class="time">2021-02-10 12:44</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev"><svg aria-hidden="true" class="icon"><use xlink:href="#icon-left"></use></svg> <a href="/docs/vue/form-and-model.html" class="prev">Vue 表单与输入绑定</a></span> <span class="next"><a href="/docs/vue/transition.html">Vue 动画原理</a> <svg aria-hidden="true" class="icon"><use xlink:href="#icon-right"></use></svg></span></p></div> </main></div><div class="global-ui"><!----><!----></div></div>
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